Pressure type clothes pounder



Dec. 25, 1951 w, HQLL 2,579,671

PRESSURE TYPE CLOTHES POUNDER Filed Jan. 27, 1947 llll HTTORNEY.

Patented Dec. 25, 1951 UNITED STATES PATENT OFFICE PRESSURE TYPE CLOTHES POUNDER James W. F. Holl, Los Angeles, Calif.

Application January 27, 1947, Serial N 0. 724,675

1 Claim.

ihis invention relates to a pressure cup and Washer wherein pressure is developed within the cup and this air under pressure is forced outwardly around the bottom of the cup, and through the material which is being washed, thus providing an effective, simple and inexpensive washing device.

An object of my invention is to provide a novel pressure cup and washer in which the lower bell portion of the cup is substantially rigid while the upper portion is collapsible under pressure exerted by the operator.

Another object of my invention is to provide a novel pressure cup and washer in which a valve is provided to automatically relieve the partial vacuum within the cup on the up-stroke thereof.

A feature of my invention is to provide a novel pressure cup and washer, in which the upper wall of the cup is tapered and is so designed that this tapered wall will collapse or bend without bending the lower or bell portion of the cup.

Another feature of my invention is to provide a novel pressure cup and washer with a simple and inexpensive means to admit air to the inside of the cup on the up-stroke thereof.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claim.

In the drawing:

Figure 1 is a transverse sectional view of my pressure cup and washer.

Figure 2 is a top plan view of the same in partially collapsed position.

Referring more particularly to the drawing, my pressure cup and washer l is formed of rubber or plastic and includes an anular hell 2, the walls of which are quite heavy and sufficiently rigid so that this bell portion will not bend or collapse during the operation of the device.

Rising from the bell 2, I provide the tapered wall 3 which terminates at its upper end in an inwardly curved portion 4. The tapered wall 3 is thicker in cross section than the portion 4, the purpose of this being to insure that the portion 4 will start to bend first when pressure is applied to the top of the cup, and as additional pressure is applied, the wall 4 will bend, the form of this bend being in the nature of a quadrangle shown at 5, and the sides of this quadrangle being curved substantially as shown in Figure 2.

The portion 4 terminates in a heavy walled hub 6 into which the handle 7 screws or is otherwise fixedly attached. A flat valve 8 is situated in the bottom of the hub 6 and preferably consists of a fiat piece of rubber or plastic which is attached to the hub by the screw 9.

A plurality of holes l0 extend through the hub and permit air to pass into the cup when the valve i is open, and this action occurs during the up-stroke of the cup. When pressure is applied to the handle I, the portion 4 will first start to bend, thereafter the wall 3 will bend, permitting the bottom of the hub 6 to move entirely to the bottom of the cup, providing sufiicient pressure is applied to the handle I. During this entire downward stroke, and the subsequent return, the bell 2 will not bend but retains its normal anular shape.

I have found that with this construction, a maximum amount of pressure can be exerted within the cup, thus providing an effective pressure washer. There is no suction in the cup due to the fact that on the up-stroke, the valve 8 opens, admitting air to the inside of the cup and thus breaking any possible vacuum in the cup.

Having described my invention, I claim:

A pressure type clothes pounder comprising a cylindrical bell open at the bottom, the lower part of said bell having a thick wall section and the upper part of said bell having a thinner wall section than the lower part thereof, the upper part of said bell being frusto-conical in shape, the upper part of said bell having a tapered Wall thickness from bottom to top, a central hub, and an upwardly curved wall portion extending to said hub, the upper part of said bell extending into the curved wall portion, said curved wall portion having a thin wall thickness, and said bell and hub being integrally formed.

JAMES W. F. HOLL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 125,738 Jameson Apr. 16, 1872 626,658 Leigh June 6, 1899 667,473 Williamson Feb. 5, 1901 684,860 Perry Oct. 22, 1901 1,711,422 Mogk Apr. 30, 1929 1,794,974 McCauley Mar. 3, 1931 

